mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-07-13 22:14:45 +03:00
394 lines
12 KiB
C
394 lines
12 KiB
C
/*
|
|
* Copyright (c) 2015-2016, Intel Corporation
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief Vermicelli: Intel SSE implementation.
|
|
*
|
|
* (users should include vermicelli.h)
|
|
*/
|
|
|
|
#define VERM_BOUNDARY 16
|
|
#define VERM_TYPE m128
|
|
#define VERM_SET_FN set16x8
|
|
|
|
static really_inline
|
|
const u8 *vermSearchAligned(m128 chars, const u8 *buf, const u8 *buf_end,
|
|
char negate) {
|
|
assert((size_t)buf % 16 == 0);
|
|
for (; buf + 31 < buf_end; buf += 32) {
|
|
m128 data = load128(buf);
|
|
u32 z1 = movemask128(eq128(chars, data));
|
|
m128 data2 = load128(buf + 16);
|
|
u32 z2 = movemask128(eq128(chars, data2));
|
|
u32 z = z1 | (z2 << 16);
|
|
if (negate) {
|
|
z = ~z;
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
for (; buf + 15 < buf_end; buf += 16) {
|
|
m128 data = load128(buf);
|
|
u32 z = movemask128(eq128(chars, data));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *vermSearchAlignedNocase(m128 chars, const u8 *buf,
|
|
const u8 *buf_end, char negate) {
|
|
assert((size_t)buf % 16 == 0);
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
|
|
for (; buf + 31 < buf_end; buf += 32) {
|
|
m128 data = load128(buf);
|
|
u32 z1 = movemask128(eq128(chars, and128(casemask, data)));
|
|
m128 data2 = load128(buf + 16);
|
|
u32 z2 = movemask128(eq128(chars, and128(casemask, data2)));
|
|
u32 z = z1 | (z2 << 16);
|
|
if (negate) {
|
|
z = ~z;
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
|
|
for (; buf + 15 < buf_end; buf += 16) {
|
|
m128 data = load128(buf);
|
|
u32 z = movemask128(eq128(chars, and128(casemask, data)));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *vermUnalign(m128 chars, const u8 *buf, char negate) {
|
|
m128 data = loadu128(buf); // unaligned
|
|
u32 z = movemask128(eq128(chars, data));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return buf + ctz32(z);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *vermUnalignNocase(m128 chars, const u8 *buf, char negate) {
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
m128 data = loadu128(buf); // unaligned
|
|
u32 z = movemask128(eq128(chars, and128(casemask, data)));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return buf + ctz32(z);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *dvermSearchAligned(m128 chars1, m128 chars2, u8 c1, u8 c2,
|
|
const u8 *buf, const u8 *buf_end) {
|
|
for (; buf + 16 < buf_end; buf += 16) {
|
|
m128 data = load128(buf);
|
|
u32 z = movemask128(and128(eq128(chars1, data),
|
|
rshiftbyte_m128(eq128(chars2, data), 1)));
|
|
if (buf[15] == c1 && buf[16] == c2) {
|
|
z |= (1 << 15);
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *dvermSearchAlignedNocase(m128 chars1, m128 chars2, u8 c1, u8 c2,
|
|
const u8 *buf, const u8 *buf_end) {
|
|
assert((size_t)buf % 16 == 0);
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
|
|
for (; buf + 16 < buf_end; buf += 16) {
|
|
m128 data = load128(buf);
|
|
m128 v = and128(casemask, data);
|
|
u32 z = movemask128(and128(eq128(chars1, v),
|
|
rshiftbyte_m128(eq128(chars2, v), 1)));
|
|
if ((buf[15] & CASE_CLEAR) == c1 && (buf[16] & CASE_CLEAR) == c2) {
|
|
z |= (1 << 15);
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *dvermSearchAlignedMasked(m128 chars1, m128 chars2,
|
|
m128 mask1, m128 mask2, u8 c1, u8 c2, u8 m1,
|
|
u8 m2, const u8 *buf, const u8 *buf_end) {
|
|
assert((size_t)buf % 16 == 0);
|
|
|
|
for (; buf + 16 < buf_end; buf += 16) {
|
|
m128 data = load128(buf);
|
|
m128 v1 = eq128(chars1, and128(data, mask1));
|
|
m128 v2 = eq128(chars2, and128(data, mask2));
|
|
u32 z = movemask128(and128(v1, rshiftbyte_m128(v2, 1)));
|
|
|
|
if ((buf[15] & m1) == c1 && (buf[16] & m2) == c2) {
|
|
z |= (1 << 15);
|
|
}
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *dvermPrecondition(m128 chars1, m128 chars2, const u8 *buf) {
|
|
m128 data = loadu128(buf); // unaligned
|
|
u32 z = movemask128(and128(eq128(chars1, data),
|
|
rshiftbyte_m128(eq128(chars2, data), 1)));
|
|
|
|
/* no fixup of the boundary required - the aligned run will pick it up */
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *dvermPreconditionNocase(m128 chars1, m128 chars2, const u8 *buf) {
|
|
/* due to laziness, nonalphas and nocase having interesting behaviour */
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
m128 data = loadu128(buf); // unaligned
|
|
m128 v = and128(casemask, data);
|
|
u32 z = movemask128(and128(eq128(chars1, v),
|
|
rshiftbyte_m128(eq128(chars2, v), 1)));
|
|
|
|
/* no fixup of the boundary required - the aligned run will pick it up */
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *dvermPreconditionMasked(m128 chars1, m128 chars2,
|
|
m128 mask1, m128 mask2, const u8 *buf) {
|
|
m128 data = loadu128(buf); // unaligned
|
|
m128 v1 = eq128(chars1, and128(data, mask1));
|
|
m128 v2 = eq128(chars2, and128(data, mask2));
|
|
u32 z = movemask128(and128(v1, rshiftbyte_m128(v2, 1)));
|
|
|
|
/* no fixup of the boundary required - the aligned run will pick it up */
|
|
if (unlikely(z)) {
|
|
u32 pos = ctz32(z);
|
|
return buf + pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *lastMatchOffset(const u8 *buf_end, u32 z) {
|
|
assert(z);
|
|
return buf_end - 16 + 31 - clz32(z);
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *rvermSearchAligned(m128 chars, const u8 *buf, const u8 *buf_end,
|
|
char negate) {
|
|
assert((size_t)buf_end % 16 == 0);
|
|
for (; buf + 15 < buf_end; buf_end -= 16) {
|
|
m128 data = load128(buf_end - 16);
|
|
u32 z = movemask128(eq128(chars, data));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf_end, z);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *rvermSearchAlignedNocase(m128 chars, const u8 *buf,
|
|
const u8 *buf_end, char negate) {
|
|
assert((size_t)buf_end % 16 == 0);
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
|
|
for (; buf + 15 < buf_end; buf_end -= 16) {
|
|
m128 data = load128(buf_end - 16);
|
|
u32 z = movemask128(eq128(chars, and128(casemask, data)));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf_end, z);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *rvermUnalign(m128 chars, const u8 *buf, char negate) {
|
|
m128 data = loadu128(buf); // unaligned
|
|
u32 z = movemask128(eq128(chars, data));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf + 16, z);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *rvermUnalignNocase(m128 chars, const u8 *buf, char negate) {
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
m128 data = loadu128(buf); // unaligned
|
|
u32 z = movemask128(eq128(chars, and128(casemask, data)));
|
|
if (negate) {
|
|
z = ~z & 0xffff;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf + 16, z);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *rdvermSearchAligned(m128 chars1, m128 chars2, u8 c1, u8 c2,
|
|
const u8 *buf, const u8 *buf_end) {
|
|
assert((size_t)buf_end % 16 == 0);
|
|
|
|
for (; buf + 16 < buf_end; buf_end -= 16) {
|
|
m128 data = load128(buf_end - 16);
|
|
u32 z = movemask128(and128(eq128(chars2, data),
|
|
lshiftbyte_m128(eq128(chars1, data), 1)));
|
|
if (buf_end[-17] == c1 && buf_end[-16] == c2) {
|
|
z |= 1;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf_end, z);
|
|
}
|
|
}
|
|
return buf_end;
|
|
}
|
|
|
|
static really_inline
|
|
const u8 *rdvermSearchAlignedNocase(m128 chars1, m128 chars2, u8 c1, u8 c2,
|
|
const u8 *buf, const u8 *buf_end) {
|
|
assert((size_t)buf_end % 16 == 0);
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
|
|
for (; buf + 16 < buf_end; buf_end -= 16) {
|
|
m128 data = load128(buf_end - 16);
|
|
m128 v = and128(casemask, data);
|
|
u32 z = movemask128(and128(eq128(chars2, v),
|
|
lshiftbyte_m128(eq128(chars1, v), 1)));
|
|
if ((buf_end[-17] & CASE_CLEAR) == c1
|
|
&& (buf_end[-16] & CASE_CLEAR) == c2) {
|
|
z |= 1;
|
|
}
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf_end, z);
|
|
}
|
|
}
|
|
return buf_end;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *rdvermPrecondition(m128 chars1, m128 chars2, const u8 *buf) {
|
|
m128 data = loadu128(buf);
|
|
u32 z = movemask128(and128(eq128(chars2, data),
|
|
lshiftbyte_m128(eq128(chars1, data), 1)));
|
|
|
|
/* no fixup of the boundary required - the aligned run will pick it up */
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf + 16, z);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// returns NULL if not found
|
|
static really_inline
|
|
const u8 *rdvermPreconditionNocase(m128 chars1, m128 chars2, const u8 *buf) {
|
|
/* due to laziness, nonalphas and nocase having interesting behaviour */
|
|
m128 casemask = set16x8(CASE_CLEAR);
|
|
m128 data = loadu128(buf);
|
|
m128 v = and128(casemask, data);
|
|
u32 z = movemask128(and128(eq128(chars2, v),
|
|
lshiftbyte_m128(eq128(chars1, v), 1)));
|
|
/* no fixup of the boundary required - the aligned run will pick it up */
|
|
if (unlikely(z)) {
|
|
return lastMatchOffset(buf + 16, z);
|
|
}
|
|
|
|
return NULL;
|
|
}
|